EP3228062A1 - Improvements to a television signal reception device and system - Google Patents

Improvements to a television signal reception device and system

Info

Publication number
EP3228062A1
EP3228062A1 EP15813896.6A EP15813896A EP3228062A1 EP 3228062 A1 EP3228062 A1 EP 3228062A1 EP 15813896 A EP15813896 A EP 15813896A EP 3228062 A1 EP3228062 A1 EP 3228062A1
Authority
EP
European Patent Office
Prior art keywords
cas
service provider
dlna
data receiving
authentication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15813896.6A
Other languages
German (de)
French (fr)
Other versions
EP3228062B1 (en
Inventor
Carmi Bogot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arris Global Ltd
Original Assignee
Arris Global Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arris Global Ltd filed Critical Arris Global Ltd
Publication of EP3228062A1 publication Critical patent/EP3228062A1/en
Application granted granted Critical
Publication of EP3228062B1 publication Critical patent/EP3228062B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25808—Management of client data
    • H04N21/25816—Management of client data involving client authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/14—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using a plurality of keys or algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]

Definitions

  • the invention relates to the provision of a signal reception and display device and system, such as a television apparatus and particularly, although not necessarily exclusively to a device and system which is adaptable in order to allow Conditional Access to the same to be made possible.
  • MVPDs multichannel video programme distributors
  • PayTV providers have made use of reception systems incorporating bespoke technologies, such as CAS (Conditional Access Systems) in order to ensure tight control over the valuable services they were delivering and to prevent unauthorised access or use of the services.
  • CAS Consumer Access Systems
  • the apparatus commonly known as a Set-top-box or broadcast data receiver has traditionally addressed this gap, providing the service and/or region specific technology in a device, connected to, but outside of, the television apparatus such that the manufacturer of the television apparatus does not have to include the system or device at the time of manufacture of the television and the services to be provided by the set top box can be implemented at the particular consumer location at which the television is to be used by connection of the set top box to the television, typically by cable connections.
  • the aim of the present invention is to provide means whereby the gap and difference between the requirements of the television apparatus manufacturer and the requirements of the end user of the apparatus, in terms of the specific services that they need to be provided, is reduced.
  • a further aim is to allow the apparatus to be provided in a form which provides the desired services to the user without the need to add significant complexity to the apparatus and/ or to the method of use of the same by the end user.
  • apparatus for the provision of one or more services to an end user, said apparatus including a service provider broadcast apparatus, a device for the receipt of data, which data is provided to be selectively accessed to allow the generation of the one or more services to the end user via the device, characterised in that said device includes a Conditional Access System (CAS) and the apparatus utilises a combination of two or more of an ETSI Key Ladder, a DLNA-CVP2 Server and/or a DLNA CVP2 Client to interact with a CAS of the service provider so as to allow the said data signals to be selectively accessed.
  • CAS Conditional Access System
  • the device includes a display screen and/ or speakers.
  • the device is connected to a display screen and/or speakers.
  • Conditional Access System of the device includes each of the ETSI Key Ladder, DLNA-CVP2 Server and DLNA CVP2 Client.
  • the DLNA Server and the DLNA Client are integrated.
  • the said device is any of a television, tablet, or other form of device which includes a display screen.
  • the DLNA-CVP2 certificate authentication mechanism is adapted to also deliver the ETSI key ladder ID to the controller of the Conditional Access System.
  • the CAS is embedded within the said device using the ETSI Key Ladder technology.
  • a device for the provision of one or more services to an end user said device allowing selective access to received data to allow the generation of the one or more services to the end user, characterised in that said device includes a Conditional Access System which utilises a combination of two or more of an ETSI Key Ladder, a DLNA-CVP2 Server and/or a DLNA CVP2 Client so as to allow the said data signals to be selectively accessed.
  • a method for providing access to one or more services provided by one or more service providers to an end user via a data receiving device by selectively accessing data received by the device via a Conditional Access System characterised in that said method includes the steps of; performing an authentication of the received data using an authentication service provider, and, if authentic, communicating the identification (ID) of a CAS of the data receiving device to the service provider, deriving whether there is an association between the device ID and the service provider Vendor ID and communicating information indicating any derived association to a CAS of the service provider which, if there is an association, derives a Root Key and one or more service keys for the said data receiving device and wherein the Vendor ID is also communicated to the CAS of the data receiving device to allow that CAS to derive the same Root Key.
  • ID identification
  • the authentication of the data is performed using a DLNA Server using the authentication service provider.
  • the authentication service provider is external.
  • the communication of the device ID is performed using an ETSI Key Ladder Management provider.
  • the communication of the Vendor ID to the data receiving device apparatus is via a connection established by an Authentication Service provider.
  • the data receiving device includes a display screen, or is connected as a separate unit thereto.
  • connection is achieved by a Key Ladder Management provider communicating the Vendor ID associated with the device ID to the Authentication Service provider.
  • Vendor ID is communicated to the data receiving device using the Broadcast data network.
  • the CAS provider and the Key Ladder Management Provider are the same entity.
  • the data receiving device ID is also communicated directiy to the Key Ladder Management Provider which communicates the device ID to the Authentication Service provider which responds indicating whether or not the data receiving device has or has not been successfully authenticated.
  • the CAS can then be enabled for data receiving devices for which successful authentication is indicated.
  • the data receiving device ID is communicated to a CAS Support provider in which a store of computer programs is maintained and which are designed for execution on the data reception and/or display device.
  • each program is designed to provide support functions for the specific CAS, such as for example, additional security processes, like monitoring, counter- measures, implementation of business rules.
  • connection established by Authentication Service provider and the device is further used to communicate the CAS specific support package to the specific device.
  • the Authentication Service provider communicates a location from which the device can obtain the CAS specific support package.
  • the CAS specific support package further includes executable functions that map /translate MVPD specific service information into a form suitable for use by the DLNA Server.
  • the present invention therefore allows the utilisation of standardised technologies which are combined and adapted in a novel way, to further close the gap and so resulting in a television reception system with both an upgradeable embedded Conditional Access System and service provider controlled, typically cloud based, interactivity.
  • Figure la illustrates prior art in the form of a known architecture for a modern television reception system
  • Figure lb illustrates how the prior art system of Figure la expands to accommodate multiple MVPD providers.
  • Figure 2 is representative of a Conditional Access System
  • FIG. 3 illustrates ETSI Key Ladder as part of a Conditional Access System
  • FIG. 4 shows the system envisaged for the DLNA Commercial Video Profile (CVP)
  • FIG. 5a - illustrates a first embodiment of the system and device in accordance with the invention
  • Figure 5b indicates key information transfers in accordance with a preferred embodiment of the invention
  • FIG. 5c illustrates a further embodiment of the invention
  • the Multi Channel video programming distributor (MVPD) 10, distributes video programme and related content 12, over a broadcast network 15.
  • a Conditional Access System (CAS) 14, is used to scramble the content using encryption mechanisms, in order to protect the service from unauthorised access by users of television apparatus, typically those users who have not paid for a particular service which is provided via that Conditional Access System.
  • CAS Conditional Access System
  • a Television capable of receiving a broadcast service 12 over a broadcast network 15.
  • Television receiver interface 31 typically comprises a terrestrial and / or cable tuner and demodulator (some Television receivers may also include other broadcast network interfaces, such as Satellite).
  • MPVD 10 specific, service 12 it must first decrypt the service using the specific corresponding Conditional Access System 35.
  • this Conditional Access System 35 is provided as a plug in module, connecting to the Television through interface 32.
  • this interface is typically a Personal Computer Memory Card International Association (PCMCIA) style interface using the Common Interface standard. In the United States, this interface is known as Cablecard or POD, (Point of Deployment module). In both cases, the CAS used by the receiver is separable from the Television receiver.
  • PCMCIA Personal Computer Memory Card International Association
  • FIG lb illustrates a first problem with this conventional system in that in order to operate correctly, the MVPD 10 requires the CAS 35 to be installed in Television 30, in order for the Television to be capable of processing that MVPD's service.
  • many other MVPDs 10' can also be broadcasting their services and these are also capable of reception by the Television.
  • the alternative MVPD's require an alternative CAS 35' to be inserted into or connected with the Television. This is particularly inconvenient to the user of the Television and requires many different CAS devices to be manufactured and distributed for each form of MVPD in order for the appropriate CAS to be available for fitment to the television apparatus in order to allow the matching MVPD to be processed.
  • FIG. lc shows, at a high-level, certain identifying information exchanged in order to provide the MVPD service.
  • Broadcast Service 12 of MVPD provider 10 includes the transmission of information 150, comprising information identifying the specific MVPD and further including information identifying a location on the internet from which associated interactive services can be accessed.
  • TV processing system 38 accesses the Interactive Services 11, using the location information 150, thereby receiving further content and/or executable scripts 160 for processing and displaying to the viewer.
  • Standardised forms of this system exist, such as the ETSI HBBTV (Hybrid Broadcast Broadband TV) increasingly adopted in Europe and the DTG DBook, specifically used in the UK.
  • ETSI HBBTV Hybrid Broadcast Broadband TV
  • Figure 2 illustrates a relatively basic Conditional Access System.
  • the content 12, typically a television or radio programme or other service is scrambled using Control Word 205.
  • Service access entitlements 210 (eg. derived from checking whether a specific viewer has a subscription) are used to produce a key 215, which is used to encrypt the Control Word 205.
  • a shared secret 200 is used to encrypt the key 215.
  • the CAS 35 using the same secret 200', recovers the service access entitlements 210' and the key 215'. If the service entitlement of the user of that device is acceptable, the key 215' can then be used to derive the Control Word 205'.
  • Control Word 205' is then used to produce descrambled content 12' from the scrambled content and so the content is available to the user via that device, such as the television apparatus.
  • FIG. 3 further shows how a device specific secret 200' is associated with a data receiving device ID 300'. This allows CAS 14, to identify the secret 200, associated with the specific device; thereby allowing many different secrets to be used amongst the different devices.
  • CAS 14 either by itself, or in conjunction with another party, (for example a Trusted Authority, not shown) maintains an association between the Device ID 300, and a specific Vendor ID 310.
  • This Vendor ID is an identifier for, most typically, a Service Provider (MVPD), or CAS provider, or Equipment Manufacturer.
  • MVPD Service Provider
  • the Vendor ID is used in conjunction with the specific Secret 200 to derive the Root Key 350.
  • the Vendor ID is communicated to the receiver's CAS 35, so it too can derive the same Root Key 350'.
  • the Root Keys 350, 350' are then used to create the layer of keys.
  • the DLNA Digital Living Network Alliance
  • CVP is the Commercial Video Profile of the more general DLNA discovery, access & rendering technologies.
  • the Commercial Video Profile addresses a need introduced by the FCC to separate the Service Access device (typically a Set-top-box) 400, from the Service Rendering device 30 (typically a Television, but now often also a tablet, PC, or other display device).
  • the Service Access Device 400 receives the MVPDs 10, broadcast service 12, protected with CAS 14.
  • the DLNA server 420 in the service access device 400, performs a standardised authentication of the DLNA client 430, in the Service rendering device 30, prior to transferring encrypted content. The credentials used in that authentication may also be established (or rejected) using an external Authentication Service provider 450.
  • FIG. 5a illustrates an embodiment of the invention.
  • Television 30, combines the DLNA Server 420 and the DLNA Client 430 in the same device.
  • the device CAS 35 which, conventionally was implemented in an external module when used directly with a television, is now embedded using the ETSI Key Ladder technology.
  • Figure 5b illustrates a preferred system for initialising the ETSI Key Ladder based CAS 35.
  • DLNA Server 420 performs an authentication, using external authentication service provider 450, the Device ID 300' of the CAS 35 is also communicated 550.
  • the trusted authentication service provider 450 communicates this Device ID 560, to an ETSI Key Ladder Management provider 510, which derives the association between the Device ID and the Vendor ID 310, (typically identifying the MVPD or CAS provider) and communicates that information 570, to the CAS 14 of the service provider.
  • CAS 14 can then derive the Root Key 200 and subsequent service keys for the specific receiver Device 30.
  • the Vendor ID 310 is further communicated 580, to the receiver device CAS 35, enabling it to derive the same Root Key 200'.
  • the communication of the Vendor ID 310, to the receiver device 30, makes use of the connection established by Authentication Service provider 450. This is achieved by Key Ladder Management provider 510 communicating the Vendor ID associated with the Device ID to the Authentication Service provider 450.
  • the Vendor ID 310 is communicated to the device using the Broadcast network 15.
  • the CAS 14 of the provider and the Key Ladder Management Provider 510 may be the same entity.
  • the Device ID 300' is also communicated direcdy to the Key Ladder Management Provider 510.
  • the Key Ladder Management Provider communicates the Device ID 300' to the Authentication Service provider 450, from which the Authentication Service provider responds indicating whether the device has or has not been successfully authenticated.
  • the CAS is then enabled for devices that succeed authentication.
  • Figure 5c illustrates a further enhancement to the invention.
  • the Device ID 300' is communicated to a CAS Support provider 610.
  • CAS Support provider 610 maintains a store of computer programs, these programs designed for execution on the device 30. In a preferred embodiment, that execution takes place on a specific security processor within the device 30.
  • Each program is designed to provide support functions for the specific CAS 35, such as for example, additional security processes, like monitoring, counter-measures, implementation of business rules.
  • connection established by Authentication Service provider 450, and the device 30, is further used to communicate the CAS specific support package 620, to the specific device 30.
  • the Authentication Service provider 450 communicates a location from which the device 30, can obtain the CAS specific support package 620 which could, for example, be obtained from either the Internet or from the Broadcast network.
  • the CAS specific support package further includes executable functions 630, that map/translate MVPD 10, specific service information (such as for example, program information broadcast in non-standardised form) into a form suitable for use by the DLNA Server 420.
  • the invention has been illustrated by way of integration within a Television device, the invention is not limited to Television devices. Furthermore the invention is not limited to integration within a Television device, as an alternative embodiment of the invention the functions 35, 410, 420 in the forms described herein, could be implemented in a detachable module connected to the device, similar to Figure la. This detachable module would no longer be service provider specific, and would be adapted to the specific service providers needs using the system herein disclosed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Computer Graphics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Details Of Television Systems (AREA)

Abstract

The present invention allows the combination and adaptation of a broadcast data reception system with a Conditional Access System which may be embedded in the receiving device, such as a television, or can be provided as a module which is connected to the receiving device and which allows service provider controlled, typically cloud based, interactivity via the same CAS with different Multi Channel video programming distributors (MVPD) service providers.

Description

Improvements to a Television Signal Reception Device and System
The invention relates to the provision of a signal reception and display device and system, such as a television apparatus and particularly, although not necessarily exclusively to a device and system which is adaptable in order to allow Conditional Access to the same to be made possible.
Traditionally, multichannel video programme distributors (MVPDs, or otherwise often known as PayTV providers) have made use of reception systems incorporating bespoke technologies, such as CAS (Conditional Access Systems) in order to ensure tight control over the valuable services they were delivering and to prevent unauthorised access or use of the services.
Whereas television manufacturers, typically companies involved in the production of mass market consumer electronics, prefer to incorporate only standardised and widely used technologies; thereby reducing the need for many variations of a product, and avoiding encumbering every product with the technology costs of specific but not ubiquitous sectors (eg. regional and/or service provider specific variations).
The apparatus commonly known as a Set-top-box or broadcast data receiver has traditionally addressed this gap, providing the service and/or region specific technology in a device, connected to, but outside of, the television apparatus such that the manufacturer of the television apparatus does not have to include the system or device at the time of manufacture of the television and the services to be provided by the set top box can be implemented at the particular consumer location at which the television is to be used by connection of the set top box to the television, typically by cable connections.
The broadcast and consumer electronics industries continue to take steps to close this gap, whilst struggling with the challenge that rapidly changing technologies and new emerging business models bring.
The aim of the present invention is to provide means whereby the gap and difference between the requirements of the television apparatus manufacturer and the requirements of the end user of the apparatus, in terms of the specific services that they need to be provided, is reduced. A further aim is to allow the apparatus to be provided in a form which provides the desired services to the user without the need to add significant complexity to the apparatus and/ or to the method of use of the same by the end user.
In accordance with a first aspect of the invention, there is provided apparatus for the provision of one or more services to an end user, said apparatus including a service provider broadcast apparatus, a device for the receipt of data, which data is provided to be selectively accessed to allow the generation of the one or more services to the end user via the device, characterised in that said device includes a Conditional Access System (CAS) and the apparatus utilises a combination of two or more of an ETSI Key Ladder, a DLNA-CVP2 Server and/or a DLNA CVP2 Client to interact with a CAS of the service provider so as to allow the said data signals to be selectively accessed.
In one embodiment the device includes a display screen and/ or speakers.
In another embodiment the device is connected to a display screen and/or speakers.
Typically the Conditional Access System of the device includes each of the ETSI Key Ladder, DLNA-CVP2 Server and DLNA CVP2 Client.
In one embodiment the DLNA Server and the DLNA Client are integrated.
In one embodiment the said device is any of a television, tablet, or other form of device which includes a display screen.
In one embodiment, the DLNA-CVP2 certificate authentication mechanism is adapted to also deliver the ETSI key ladder ID to the controller of the Conditional Access System.
Typically the CAS is embedded within the said device using the ETSI Key Ladder technology.
In a further aspect of the invention there is provided a device for the provision of one or more services to an end user, said device allowing selective access to received data to allow the generation of the one or more services to the end user, characterised in that said device includes a Conditional Access System which utilises a combination of two or more of an ETSI Key Ladder, a DLNA-CVP2 Server and/or a DLNA CVP2 Client so as to allow the said data signals to be selectively accessed.
A method for providing access to one or more services provided by one or more service providers to an end user via a data receiving device by selectively accessing data received by the device via a Conditional Access System (CAS), characterised in that said method includes the steps of; performing an authentication of the received data using an authentication service provider, and, if authentic, communicating the identification (ID) of a CAS of the data receiving device to the service provider, deriving whether there is an association between the device ID and the service provider Vendor ID and communicating information indicating any derived association to a CAS of the service provider which, if there is an association, derives a Root Key and one or more service keys for the said data receiving device and wherein the Vendor ID is also communicated to the CAS of the data receiving device to allow that CAS to derive the same Root Key.
In one embodiment the authentication of the data is performed using a DLNA Server using the authentication service provider. In one embodiment the authentication service provider is external.
In one embodiment the communication of the device ID is performed using an ETSI Key Ladder Management provider.
In one embodiment the communication of the Vendor ID to the data receiving device apparatus is via a connection established by an Authentication Service provider.
In one embodiment the data receiving device includes a display screen, or is connected as a separate unit thereto.
In one embodiment the connection is achieved by a Key Ladder Management provider communicating the Vendor ID associated with the device ID to the Authentication Service provider.
In an alternative embodiment the Vendor ID is communicated to the data receiving device using the Broadcast data network. In one embodiment, the CAS provider and the Key Ladder Management Provider are the same entity.
In one embodiment the data receiving device ID is also communicated directiy to the Key Ladder Management Provider which communicates the device ID to the Authentication Service provider which responds indicating whether or not the data receiving device has or has not been successfully authenticated. The CAS can then be enabled for data receiving devices for which successful authentication is indicated.
In one embodiment, if authentication is successful, the data receiving device ID is communicated to a CAS Support provider in which a store of computer programs is maintained and which are designed for execution on the data reception and/or display device.
In one embodiment that execution takes place on a specific security processor within the device.
Typically, each program is designed to provide support functions for the specific CAS, such as for example, additional security processes, like monitoring, counter- measures, implementation of business rules.
In one embodiment, the connection established by Authentication Service provider and the device is further used to communicate the CAS specific support package to the specific device.
In an alternative embodiment, the Authentication Service provider communicates a location from which the device can obtain the CAS specific support package.
In a further embodiment, the CAS specific support package further includes executable functions that map /translate MVPD specific service information into a form suitable for use by the DLNA Server.
The present invention therefore allows the utilisation of standardised technologies which are combined and adapted in a novel way, to further close the gap and so resulting in a television reception system with both an upgradeable embedded Conditional Access System and service provider controlled, typically cloud based, interactivity. Specific embodiments of the invention are now described with reference to the accompanying drawings: wherein
Figure la— illustrates prior art in the form of a known architecture for a modern television reception system
Figure lb — illustrates how the prior art system of Figure la expands to accommodate multiple MVPD providers.
Figure lc - illustrates the prior art system of Figures la and b and key information transfers that facilitate the provision of the selected MVPD service
Figure 2— is representative of a Conditional Access System
Figure 3— illustrates ETSI Key Ladder as part of a Conditional Access System
Figure 4— shows the system envisaged for the DLNA Commercial Video Profile (CVP)
Figure 5a - illustrates a first embodiment of the system and device in accordance with the invention
Figure 5b— indicates key information transfers in accordance with a preferred embodiment of the invention
Figure 5c— illustrates a further embodiment of the invention
Referring firstly to prior art systems of the type illustrated in Figure la, the Multi Channel video programming distributor (MVPD) 10, distributes video programme and related content 12, over a broadcast network 15. A Conditional Access System (CAS) 14, is used to scramble the content using encryption mechanisms, in order to protect the service from unauthorised access by users of television apparatus, typically those users who have not paid for a particular service which is provided via that Conditional Access System.
At a user location, such as Home 20, there is provided a Television (receiver and display) capable of receiving a broadcast service 12 over a broadcast network 15. Television receiver interface 31 typically comprises a terrestrial and / or cable tuner and demodulator (some Television receivers may also include other broadcast network interfaces, such as Satellite). In order for Television 30 to be able to process the CAS 14 protected, MPVD 10 specific, service 12, it must first decrypt the service using the specific corresponding Conditional Access System 35. In conventional Television receivers 30, this Conditional Access System 35, is provided as a plug in module, connecting to the Television through interface 32. In Europe this interface is typically a Personal Computer Memory Card International Association (PCMCIA) style interface using the Common Interface standard. In the United States, this interface is known as Cablecard or POD, (Point of Deployment module). In both cases, the CAS used by the receiver is separable from the Television receiver.
Figure lb, illustrates a first problem with this conventional system in that in order to operate correctly, the MVPD 10 requires the CAS 35 to be installed in Television 30, in order for the Television to be capable of processing that MVPD's service. However, many other MVPDs 10', can also be broadcasting their services and these are also capable of reception by the Television. However, the alternative MVPD's require an alternative CAS 35' to be inserted into or connected with the Television. This is particularly inconvenient to the user of the Television and requires many different CAS devices to be manufactured and distributed for each form of MVPD in order for the appropriate CAS to be available for fitment to the television apparatus in order to allow the matching MVPD to be processed.
Figure lc, shows, at a high-level, certain identifying information exchanged in order to provide the MVPD service. Broadcast Service 12 of MVPD provider 10, includes the transmission of information 150, comprising information identifying the specific MVPD and further including information identifying a location on the internet from which associated interactive services can be accessed. TV processing system 38, accesses the Interactive Services 11, using the location information 150, thereby receiving further content and/or executable scripts 160 for processing and displaying to the viewer. Standardised forms of this system exist, such as the ETSI HBBTV (Hybrid Broadcast Broadband TV) increasingly adopted in Europe and the DTG DBook, specifically used in the UK.
Figure 2 illustrates a relatively basic Conditional Access System. The content 12, typically a television or radio programme or other service, is scrambled using Control Word 205. Service access entitlements 210, (eg. derived from checking whether a specific viewer has a subscription) are used to produce a key 215, which is used to encrypt the Control Word 205. A shared secret 200, is used to encrypt the key 215. At the receiver device, the CAS 35, using the same secret 200', recovers the service access entitlements 210' and the key 215'. If the service entitlement of the user of that device is acceptable, the key 215' can then be used to derive the Control Word 205'. Control Word 205' is then used to produce descrambled content 12' from the scrambled content and so the content is available to the user via that device, such as the television apparatus.
Commercially practical Conditional Access Systems make use of a hierarchy of keys to both segment the system into manageable groups and protect the shared secret. This key layering (often called a key ladder) has been standardised in ETSI TS 103 162 and is illustrated in Figure 3. Figure 3 further shows how a device specific secret 200' is associated with a data receiving device ID 300'. This allows CAS 14, to identify the secret 200, associated with the specific device; thereby allowing many different secrets to be used amongst the different devices. CAS 14, either by itself, or in conjunction with another party, (for example a Trusted Authority, not shown) maintains an association between the Device ID 300, and a specific Vendor ID 310. This Vendor ID is an identifier for, most typically, a Service Provider (MVPD), or CAS provider, or Equipment Manufacturer. The Vendor ID is used in conjunction with the specific Secret 200 to derive the Root Key 350. The Vendor ID is communicated to the receiver's CAS 35, so it too can derive the same Root Key 350'. The Root Keys 350, 350' are then used to create the layer of keys.
The DLNA (Digital Living Network Alliance) is an industry consortium developing standards that enable in-home, connected devices to discover, access and render various services (such as for example multimedia content). Figure 4 illustrates a recently completed standardisation effort to allow Commercial content to be made available on the home network. CVP is the Commercial Video Profile of the more general DLNA discovery, access & rendering technologies. The Commercial Video Profile addresses a need introduced by the FCC to separate the Service Access device (typically a Set-top-box) 400, from the Service Rendering device 30 (typically a Television, but now often also a tablet, PC, or other display device). The Service Access Device 400, receives the MVPDs 10, broadcast service 12, protected with CAS 14. It removes the CAS 35, and extracts information 410, associated with the Broadcast service 12, for presentation by the DLNA Server 420, which makes that information accessible to devices, such as televisions or other display devices which are connected, such as connected across a home network in a standardised form. As the broadcast service 12 comprises valuable commercial content, the transfer of that content 415, across the home network is protected from copying. The DLNA server 420, in the service access device 400, performs a standardised authentication of the DLNA client 430, in the Service rendering device 30, prior to transferring encrypted content. The credentials used in that authentication may also be established (or rejected) using an external Authentication Service provider 450.
Figure 5a illustrates an embodiment of the invention. Television 30, combines the DLNA Server 420 and the DLNA Client 430 in the same device. The device CAS 35, which, conventionally was implemented in an external module when used directly with a television, is now embedded using the ETSI Key Ladder technology.
Figure 5b illustrates a preferred system for initialising the ETSI Key Ladder based CAS 35. When DLNA Server 420 performs an authentication, using external authentication service provider 450, the Device ID 300' of the CAS 35 is also communicated 550. The trusted authentication service provider 450, communicates this Device ID 560, to an ETSI Key Ladder Management provider 510, which derives the association between the Device ID and the Vendor ID 310, (typically identifying the MVPD or CAS provider) and communicates that information 570, to the CAS 14 of the service provider. CAS 14 can then derive the Root Key 200 and subsequent service keys for the specific receiver Device 30. The Vendor ID 310, is further communicated 580, to the receiver device CAS 35, enabling it to derive the same Root Key 200'.
In a preferred embodiment, the communication of the Vendor ID 310, to the receiver device 30, makes use of the connection established by Authentication Service provider 450. This is achieved by Key Ladder Management provider 510 communicating the Vendor ID associated with the Device ID to the Authentication Service provider 450. Alternatively, and as shown in Figure 5b, the Vendor ID 310 is communicated to the device using the Broadcast network 15. In a further embodiment, the CAS 14 of the provider and the Key Ladder Management Provider 510, may be the same entity.
In an alternative embodiment of the invention, the Device ID 300' is also communicated direcdy to the Key Ladder Management Provider 510. The Key Ladder Management Provider communicates the Device ID 300' to the Authentication Service provider 450, from which the Authentication Service provider responds indicating whether the device has or has not been successfully authenticated. The CAS is then enabled for devices that succeed authentication.
Figure 5c illustrates a further enhancement to the invention. Following successful authentication by Authentication Service provider 450, the Device ID 300' is communicated to a CAS Support provider 610. CAS Support provider 610, maintains a store of computer programs, these programs designed for execution on the device 30. In a preferred embodiment, that execution takes place on a specific security processor within the device 30. Each program is designed to provide support functions for the specific CAS 35, such as for example, additional security processes, like monitoring, counter-measures, implementation of business rules.
In one embodiment, the connection established by Authentication Service provider 450, and the device 30, is further used to communicate the CAS specific support package 620, to the specific device 30. In an alternative embodiment the Authentication Service provider 450, communicates a location from which the device 30, can obtain the CAS specific support package 620 which could, for example, be obtained from either the Internet or from the Broadcast network.
In a further enhancement to the invention, the CAS specific support package further includes executable functions 630, that map/translate MVPD 10, specific service information (such as for example, program information broadcast in non- standardised form) into a form suitable for use by the DLNA Server 420.
Although the invention has been illustrated by way of integration within a Television device, the invention is not limited to Television devices. Furthermore the invention is not limited to integration within a Television device, as an alternative embodiment of the invention the functions 35, 410, 420 in the forms described herein, could be implemented in a detachable module connected to the device, similar to Figure la. This detachable module would no longer be service provider specific, and would be adapted to the specific service providers needs using the system herein disclosed.

Claims

Claims
1. Apparatus for the provision of one or more services to an end user, said apparatus including a service provider broadcast apparatus (10), a device (30) for the receipt of data, which data is provided to be selectively accessed to allow the generation of the one or more services to the end user via the device, characterised in that said device includes a Conditional Access System (CAS) (35) and the apparatus utilises a combination of two or more of an ETSI Key Ladder, a DLNA- CVP2 Server (420) and/or a DLNA CVP2 Client (430) to interact with a CAS (14) of the service provider (10) so as to allow the said data signals to be selectively accessed.
2. Apparatus according to claim 1 wherein the device includes a display screen and/ or speakers.
3. Apparatus according to claim 1 wherein the said device is any of a television, tablet, or other form of device which includes a display screen.
3. Apparatus according to claim 1 wherein the device is connected to a display screen and/or speakers.
4 Apparatus according to claim 1 wherein the apparatus includes each of the ETSI Key Ladder, DLNA-CVP2 Server and DLNA CVP2 Client.
5 Apparatus according to claim 1 wherein the DLNA Server and the DLNA Client are integrated.
6. Apparatus according to claim 1 wherein a DLNA-CVP2 certificate authentication mechanism is adapted to also deliver the ETSI key ladder ID to a controller of the CAS.
7 Apparatus according to claim 1 wherein the device CAS (35) is embedded within the said device using the ETSI Key Ladder technology.
8. A device (30) for the provision of one or more services to an end user, said device allowing selective access to received data to allow the generation of the one or more services to the end user, characterised in that said device includes a Conditional Access System (CAS) (35) which utilises a combination of two or more of an ETSI Key Ladder, a DLNA-CVP2 Server (420) and/or a DLNA CVP2 Client (430) so as to allow the said data signals to be selectively accessed.
9. A method for providing access to one or more services provided by one or more service providers (10) to an end user via a data receiving device (30) by selectively accessing data received by the device via a Conditional Access System (CAS) (14,35), characterised in that said method includes the steps of; performing an authentication of the received data using an authentication service provider, and, if authentic, communicating the identification (ID) of a CAS (35) of the data receiving device (30) to the service provider (10), deriving whether there is an association between the device ID and the service provider Vendor ID and communicating information indicating any derived association to a CAS (14) of the service provider (10) which, if there is an association, derives a Root Key and one or more service keys for the said data receiving device (30) and wherein the Vendor ID is also communicated to the CAS (35) of the data receiving device (30) to allow that CAS (35) to derive the same Root Key.
10. A method according to claim 9 wherein the authentication of the data is performed using a DLNA Server using the authentication service provider.
11. A method according to claim 10 wherein the authentication service provider is an external provider.
12. A method according to claim 9 wherein the communication of the device ID is performed using an ETSI Key Ladder Management provider.
13. A method according to claim 9 wherein the communication of the Vendor ID to the data receiving device is via a connection established by the Authentication Service provider.
14. A method according to claim 9 wherein the data receiving device includes a display screen and/ or speakers.
15 A method according to claim 9 wherein the data receiving device is connected as a separate unit to the display screen and/or speakers. 16 A method according to claim 9 wherein a Key Ladder Management provider communicates the Vendor ID associated with the device ID via the Authentication Service provider.
17 A method according to claim 9 wherein the Vendor ID is communicated to the data receiving device using a Broadcast data network.
18 A method according to claim 9 wherein the CAS and the Key Ladder Management Provider are the same entity.
19 A method according to claim 9 wherein the device ID is also communicated directly to a Key Ladder Management Provider which communicates the device ID to the Authentication Service provider which responds indicating whether the data receiving device has or has not been successfully authenticated and, if successful the CAS is enabled for data receiving devices for which successful authentication is indicated.
20 A method according to claim 19 wherein if authentication is successful, the data receiving device ID is communicated to a CAS Support provider in which a store of computer programs is maintained and which are designed for execution on the data receiving device.
21 A method according to claim 20 wherein the execution is performed on a specific security processor within the device.
22 A method according to claim 20 wherein the said programs provide support functions for the specific device CAS.
23 A method according to claim 22 wherein the support functions include additional security processes in the form of monitoring, counter-measures and/ or implementation of business rules.
24 A method according to claim 9 wherein the connection established by the Authentication Service provider and the device is further used to communicate one or more CAS specific support packages to the device.
25 A method according to claim 9 wherein the Authentication Service provider communicates to the device details of a location from which the device can obtain one or more CAS specific support packages. 26 A method according to claims 24 or 25 wherein the CAS specific support package further includes executable functions that map/translate MVPD specific service information into a form suitable for use by the DLNA Server.
EP15813896.6A 2014-12-01 2015-11-26 Improvements to a television signal reception device and system Active EP3228062B1 (en)

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GBGB1421302.9A GB201421302D0 (en) 2014-12-01 2014-12-01 Improvements to a television signal reception device and system
PCT/GB2015/053611 WO2016087823A1 (en) 2014-12-01 2015-11-26 Improvements to a television signal reception device and system

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CN111131869B (en) * 2019-12-31 2021-12-28 国微集团(深圳)有限公司 Method and system for dynamically switching multiple CA systems in real time
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US7565546B2 (en) * 1999-03-30 2009-07-21 Sony Corporation System, method and apparatus for secure digital content transmission
US20020146125A1 (en) * 2001-03-14 2002-10-10 Ahmet Eskicioglu CA system for broadcast DTV using multiple keys for different service providers and service areas
US20130347025A1 (en) * 2011-11-30 2013-12-26 Intel Corporation Providing remote access via a mobile device to content subject to a subscription
ES2816324T3 (en) * 2012-12-21 2021-04-05 Nagravision Sa Method that uses a single authentication device to authenticate a user to a service provider among a plurality of service providers and device to perform said method
US9203832B2 (en) * 2013-03-12 2015-12-01 Cable Television Laboratories, Inc. DTCP certificate authentication over TLS protocol
WO2015183234A1 (en) * 2014-05-27 2015-12-03 Hewlett-Packard Development Company, L.P. Portable speaker
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US10694235B2 (en) 2020-06-23
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